Mounting for rock drills



Nov. 20, 1945. o. H. SELLARS MOUNTING FOR ROCK DRILLS Filed Sept; 9, 1944 w 3 E w 2 6 o E a x 1 8. 8 I 4 F 9 5 8 5 4 x 8 u $7 6 a o 6 w 7 7 5 4 5 5 f9 5 4 5 0 0 ML n 6 R 8 w 78 W 5 \5 -54 M1, 9 $4 fimfl It 1 I mvam'oa OZHIerHJeI/Z and.

ms ATTORNEY.

Patented Nov. 20, 1945 MOUNTING FOR ROCK DRILLS Oliver H. Sellars, Glen Ridge, N, J., assignor to I ngersol l-R'and Company, New York, corporation'of New Jersey App ica eptembe 9, 9. Se a NQ- 53 39 2 Claims.

This invention relates to drilling mechanism, and more particularly to a mounting for rock i s f th r f r. type One object of the invention is to, enable the rock drill to be easily and quickly set in a desired in o io Another object is to lighten the work of movingthe rock drill with respect to the mounting from one drilling position to another.

Still another object is to provide a stablesupp t f r e. r c dr ll.

Other objects will be in part obvious and in part pointed out hereinafter.

In the drawing accompanyin this specifica: tion and in which similar reference numerals refer. to similar parts,

Figure 1 is an elevation, partly in section, or a rock drill mounting constructed in accordance with the practice of the invention, and

Figure 2 is a transverse view taken through u e 1 n. t e. li e.

Referring more partic larly, to the drawing,

the mounting, designated in general, by 2.0, comprises a column 2 I of the extensible type that stands upon a platform 22 of a truck 23, restingv upon a track 24'.

The column 2 is of the. pressure fluid actuated type, It comprises a vertical cylinder .25. that extends with its lowermost end into the bore 25 .of a bas plate 2,! constituting the lower end of the column and secured. to, the platform 22 by bolts 28. The interior of the cylinder. 25 serves as a piston chamber 29 to, accommodate a piston all, and on the piston 31], is a rod 3!. that projects from they upper. end of, the cylinder 25. and carries a pointer 32 for engagement with overlying rock 33,

In'the lower end of the cylinder. is a port 34. that opens into a supply chamber 3 5,in the. base plat 21, and in the base plate is a valve 35.. for controlling the admission and exhaust of pressure fluid, into and from the chamber 315. and thus the piston chamber 29. The valve 3.6 is shown asbeing of the rotary. type, having a lever 5'! whereby it may be manipulated, and in said valveisa bore 38 into which pressure fluid is constantly admitted by a supply conduit 39. connected to the. base plate ZJ to openintothe chamber 40,containing the valve 35. I

Inj'the wall of the valve is a port 4.! for registration with a passage 42' leading from the chamber :lptothe chamber 3,5, and in the peripheral surface of. the valve 36 is a partly annular groove 43 to aiford communication between the.

passage 42 and an exhaust port 44 leading from the chamber s m tm The above described devices are so. arranged and operate in such wise that whenever it is intended to set up. the. column adjacent a working Surface and secure it firmly in position be.-. tween thev platform and the overlying rock, the valve 36 is rotated into position to place the port 4i in registration with the. passage. 42. Pressure. fluid. will then how through thesev channels, the chamber 35, and the port 3'4 into the. lower end of the piston chamber 29 and drive. the piston 3]! and the pointer 32 upwardly to press the latter into engagement with the rock.

If it be intended to release the pointer 32 from the rock, the valve 36, is rotated to place the groove 43 into. communication with the passage 42 and the exhaust port 44. The. pressure. fluid will then escape, from the lower end of the. piston chamber 29 to permit the piston 3!! to. descend by gravity and withdraw the. pointer 32 from its rock ngaging position.

As is customary, the column 2:! serves to. support the weight of a drifter type rock drill designated 45 and a bearing 46 is accordingly disposed on the cylinder 25 to support an end of an arm 41 upon which the rock drill 45 is mounted. The bearing 46 is of generally sleeve shape. It is split longitudinally to divide it into a pair oi sections 48 and 49 that hav flanges 55 on their opposed side surfaces. suitably spaced with respect to. each other to enable the sections to be firmly clamped to the cylinder 25 by bolts 5i extending through the flanges.

The arm 41 is connected onlyto the section 49-, and in the form shown is telescopically connected with a stem 52% of a gear box 53 having at its opposite end a pair of lugs 54. that seat agains the. outer surfaces of a projection. 55- on the side of the bearing section '49. The lugs 54 and theprojection 55 are apertured to receive a pinv 56that serves as a horizontal pivot for the arm 47. The pin 56 may, as shown, be in the form of. a bolt having the usual head 5-? at one end to. seat against, the outer surface of a lug 54, and a nut 58 threaded thereon to seat against the outer surface of the other lug 54.

The arm is hollow, its interior serving as a piston chamber 59 that has a guide bushing 60 threaded'into its outer end, and in the piston chamber 59- is apiston 6| having a rod 62 that extends slidably through the guide bushing 60 and carries a pointer t3 for engagement with a rock surface, as for example the wall or end of a tunnel. The piston 61 is actuated by pressure fluid. for pressing the pointer 63 against such wall; and the admission of pressure fluidand theexhaust thereof, to andfromthepiston chamber 59 is controlled by a valve 64 on the gear box 53.

The casing 65 for the said valve is connected to the gear box by a nipple 66 that opens into a passage 61 leading through the gear box and the stem 52 to the piston chamber 59. The valve 64 is of the rotary type and has a recess 68 in the side thereof to selectively afford communication between the nipple 66 and an atmospheric exhaust port 69 in the casing 65 and between the nipple 66 and a connection threaded to the casing 65.

A conduit leading from the chamber 35 to the connection 10 serves to convey pressure fluid to the valve 64 and also to a conduit 12 leading from the connection 10 to the rock drill 45 and, in the example shown, through a branch conduit 13 leading from the conduit 12 to a fluid actuated feeding motor 14, of a well known type, used for moving the rock drill 45 toward and from the work.

In order to facilitate the operation and make less burdensome the work of swinging the arm 41 and parts carried thereby in a vertical plane about the pivot 56, a stationary segment gear 75 is arranged in a slot 16 in the lug 54 and its teeth 71 mesh with the thread ofa worm 18 in the gear box 53. The segment gear is held fixedly in position in the projection 55 by the pivot 56 which extends through the segment, and by a lug 19 on the chord side of the gear extending into a depression 88 at the bottom of the'slot 16.

The ends of the shaft 8| carrying the worm 18 are journaled in the upper and lower walls of the gear box 53, and on said shaft is a gear 82 that meshes with a pinion 83 carried by a shaft 84 extending through the wall of the ear box to the exterior thereof and having a crank 85 whereby the Worm 18 may be manually rotated.

Means are also provided to enable the bearing 46, together with the elements which it supports, to be conveniently moved endwise of the cylinder 25 in order to place the'rOCk drill 45 in a desired position with respect to the working surface. To this end a rack 86 is disposed loosely on the outer surface of the cylinder 25' to extend approximately along the entire length thereof, and in the bearing section 48 is a gear 81 to mesh with the rack. The gear 81 is keyed to a shaft 88 journaled in the wall of the bearing section 48 and on one end of said shaft is a crank 89 for rotating the gear.

The rack 86 lies in a slot 90 in the inner or bearing surface of the section 48 so that the rack is held in the correct assembled relationship with the gear 87 and will also rotate with the bearing aboutthe cylinder 25. On the upper and lower ends of the rack 86 are collars 9| that encircle the cylinder and are rotatable thereon to stabilize the ends of the rack. The lower collar 9| seats upon the top surface 92 of the base plate 21, andthe rack is held against movement in an upwardly direction by an external flange 63 of a bushing 94 threaded into the upper end of the cylinder 25 to guide the rod 3|.

In the operation of the device, whenever it is intended to place the mounting in position to support the rock drill 45 adjacent-a working surface the column 2| is extended in the manner previously described and the bearin 46 is then raised, or lowered, by rotation of the crank 89 to place the arm 41 in substantially the desired position. The bolts 5| are next manipulated to der 25. Thereafter, the worm 18 is rotated, by means of the crank 85, to swing the arm 41 upwardly or downwardly to the desired angle with respect to the work, and the valve 64 is then placed in position to establish communication between the connection 10 and the nipple 66.

In this position of the valve 64 pressure fluid will flow through the passage 61 into the piston chamber 59 and drive the piston 6| outwardly, thereby pressing the pointer 63 against the working surface. The entire mounting, including the free end of the arm 41, will then be firmly braced and supported to enable it to withstand the vibration to which it is subjected during the operation of the rock drill 45.

After the drill hole has been completed and it is intended to place the rock drill 45 in another drilling position, as for example for the drilling of a hole in the same horizontal plane as the previously drilled hole, the valve 64 is rotated to a position to place the recess 68 in registry with the nipple 66 and the exhaust port 69. The preS- sure fluid will then escape from the piston chamber 59 to the atmosphere and the pointer 63 may move out of or be readily withdrawn from engagement with the rock surface. The clamping force of the bolts 5| is then relieved sufficiently to enable the bearing to be rotated about the column.

During such rotative movement of the bearing the rack 86 will rotate with it, and when the rock drill has been again suitably positioned with respect to the work the bearing sections 48 and 49 are clamped to the cylinder and pressure fluid is then admitted into the piston chamber 59 to actuate the piston 6| for driving the pointer 63 against the rock surface.

As will be readily seen from the foregoing description, the arm 41 may be conveniently and quickly shifted relatively to the column, both rotatively and vertically, to place the rock drill in a favorable drilling position with respect to the work and with a minimum of effort on the part of the operator.

I claim:

1. A mounting for rock drills and the like, comprising a cylindrical support member, a bearing rotatable on the support member, means on the bearing to support a rock drill, a rack extending along the side of the support member and interlockingly engaging the bearing to rotate therewith on the support member, collars affixed to the rack rotatable on the support member to enable the rack to rotate about the support member, and a pinion in the bearing in engagement with the rack for moving the bearing axially of the support member.

2. A mounting for rock drills and the like, comprising a cylindrical support member, a bearing rotatable on the support member split longitudinally into a pair of sections, means for clamping the sections to the support member, a rack extending through one of the sections in interlocking engagement therewith to rotate with the section on the support member and lying loosely on the surface of the support member, collars affixed to the rack rotatable on the support member to enable the rack to' rotate aboutthe support member, a pinion in one of the sections engaging the rack for moving the bearing axially'of the support member, and means for supporting the rock drill and being pivotally connected to the other bearing section.

OLIVER' H. SELL-Ans. 

